Research On Agricultural Product Traceability System Supporting PDP Protocol

As a traditional industry in China,the quality and safety of agricultural products has always been the focus of attention in China At present,how to use the traceability system of agricultural products to strengthen the quality and safety control of agricultural products has become an urgent matter.The agricultural products traceability system provides consumers and suppliers with a complete information exchange platform for the whole agricultural products supply chain.The traceability system ensures that the information of all links before and after each agricultural product enters the market can be collected accurately,which is helpful to monitor the quality and safety of agricultural products.Consumers can check the complete traceability information of agricultural products through the traceability platform to ensure that the purchased agricultural products are safe and reliable.Suppliers can take corresponding measures in time for the problematic agricultural products through the traceability platform.However,with the continuous development of traceability system,some businesses or enterprises will tamper with and destroy traceability information for their own interests,leading to the listing of unqualified agricultural products.This behavior will greatly hurt consumers and traceability system.In order to solve the security problem of traceability information,the data integrity verification mechanism is introduced to ensure the integrity and reliability of traceability information.According to the current development of agricultural products traceability system,combined with the relatively mature data integrity verification mechanism,this paper realizes the agricultural products traceability system supporting PDP protocol(data integrity verification mechanism).The research of this paper is divided into the following three parts:(1)This thesis analyzes the requirements of the traceability system of agricultural products in different business scenarios,designs the overall architecture of the traceability system,constructs the functional module diagram according to different business scenarios,and makes a detailed description.Finally,in view of the existing security risks of the traceability system of agricultural products,the traceability system of agricultural products supporting PDP protocol is designed,which enables users to obtain agricultural products.The traceability information of the whole product stage ensures the integrity and effectiveness of the traceability information.(2)In this scheme,the lightweight vector dot product is introduced to replace the original index label in the label generation stage,and the multi branch authentication tree is used to replace the Merkle hash tree in the dynamic update stage,which reduces the computation cost in these two stages.However,this method is implemented at the expense of the performance of other phases,resulting in the increase of time complexity of other phases.The experimental results prove the feasibility of the experiment.(3)The traceability system of agricultural products supporting PDP protocol is designed.In this thesis,the traceability system of agricultural products supporting PDP protocol is implemented from the perspectives of consumers,suppliers and administrators.From the perspective of consumers,the purchase of agricultural products and the query of traceability information are realized,from the perspective of suppliers,agricultural production information records,agricultural products upload and traceability information verification are realized.From the perspective of the administrator,the functions of agricultural product audit and log management are realized.